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With the assessment of single-phase microgrids (MGs), three-phase/single-phase (TP/SP) hybrid multi-microgrids (MMGs) are emerging, provided with more complex architecture. This paper deals with the black-start problem for TP/SP MMGs in islanded mode caused by an unscheduled breakdown from the main grid. The three-phase units, such as energy storage systems (ESSs), photovoltaic (PV) systems, and loads,...
With the popularization and application of microgrid projects, the multi-microgrids (MMGs) with three-phase / single-phase (TP/SP) architecture is formed in a plurality of adjacent microgrids with certain needs. Due to the complexity of the topology and the diversity of the power supply modes, the MMGs can operate in various modes. It is an urgent problem to realize the flexible seamless switching...
With the fast proliferation of residential microgrids integrated into the power grid, it is crucial to develop a low cost and high efficiency microgrid central control (MGCC) for promoting the large-scale application of residential microgrids. Considering various users' demand, we develop a novel MGCC based on the multi-level communication model. The MGCC integrates many functional modules, including...
With microgrids merging into the distribution network on a large scale, multi-layer microgrids was formed in a certain area, which had flexible operation modes, large quantities of power supplies with different operating characteristics, and complicated control methods. Aimed at multi-layer PV-ESS microgrids which was widely applied, this paper proposed a power coordinated control algorithm based...
Microgrids (MGs) is developing at an incredible speed in recent years, combined by multiple microgrids, multi-microgrids (MMGs) gradually become a new form of power grids. A stabilized and effective black start strategy for MMGs is in an urgent demand. In this paper, we analyze the topology and control system of the residential type MMGs with three-phase/single-phase (TP/SP) architecture. Then, we...
This paper proposes an optimal sizing and control strategy for islanded microgrid, consisting of renewable energy sources such as wind turbine generators (WT) and solar photovoltaic generators (PV), diesel generators (DE) and battery storage system (BS). The problem is formulated to minimize the annualized system cost (ASC) based on a control strategy with two modes. In mode 1, BS is the main power...
In promotion of the new energy policy, the large-scale expansion of constructions of the wind and solar power is developing in China, whose random high-power electric energy fluctuation causes huge shock to the power grid. Confronting this important problem of the power system safe operation, it is really top urgent to build a feasible solution to develop the large-scale new energy. Therefore, this...
In order to solve high energy consumption and avoid energy wasted in industry, an energy-saving pulse power supply is used in this paper. According to the principle of electrostatic precipitation, the paper analyzes the reason of anti-corona when higher resistivity powder is removed. Electrostatic precipitation can work with high efficiency and energy-saving by using new technique of power supply...
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